<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        .container{
            width: 100%;
            max-width: 600px;
            border: 1px solid #ccc;
            border-radius: 5px;
            padding: 20px;
            margin: 50px auto;
        }
        .info{
            text-indent: 2em;
            color: #999;
            line-height: 60px;
        }
        .footer{
            text-align: right;
            line-height: 50px;
            font-size: 14px;
            color: #999;
        }
    </style>
</head>
<body>
    <div class="container">
        <h4 style="color: #666;">尊敬的用户: <?= $username ?></h4>
        <div class="info">
            您本次的注册验证码为: <?= $code ?>,（有效5分钟），请尽快完成注册验证!!!
        </div>
        <div class="footer">
            WT18邮件服务组
        </div>
    </div>
</body>
</html>